Concentrated Poison changed to Potency(1/3)- Each level of this perks gives you 5 more hits with a poisoned weapon.

Green Thumb- Instead of you getting one extra plant after harvesting you now get an extra 4.- Level in alchemy required for the perk is now 80 instead of 70.- You need "Potency" maxed out in order to learn this perk.

Purity changed to Alchemical Mastery.-Tacked on an additional 50% increase in poison/potion proficiency.

I highly recomend if you have already invested points into alchemy that you use this mod with a new game or at least a character who hasn't invested points in the skill as you will lose them.